backports for ActivityLog and Reporting 1.11.x

[mpalmi]

This PR encapsulates the backports for Census and ActivityLog changes to get the release branches in sync and should resolve VAULT-14702 and VAULT-14765 along with the backports for the new client count testing library.

It was easier to backport the changes en masse, since they're all intertwined. Teasing apart feature-specific changes would have been more difficult.

Commits were prepared using (with fish shell, $() is just ()):

git cherry-pick -v -x (git log origin/release/1.11.x..origin/main --oneline --reverse -- "*activity*" | awk '{ print $1 }')

Diff between backport and main

## NOTE: This diff does not include changes to core. 
git diff origin/activitylog-backports-1.11.x..origin/main -- "*activity*" "*census*" ':!ui/*'

https://gist.github.com/mpalmi/9b83c19a45002a045b216d6d6446f357

[mpalmi]

While going through the backport, there were 4 classes of commits (marked below). The backports for 1.11.x also pull in HLL estimate changes, which will be marked with ⏫ to show where this PR begins:

❌ empty commits, which had already been backported but weren't attributed by git
❌ superfluous changes which rejected the entire commit (these got the 'ol --skip during the cherry-pick)
[no modifier] changes that ported over (sometimes with amendment)
[no modifier] clean cherry-picks, which ported over with no modifications
⏫ HLL estimate backports

⏫ 2a8a8a8 fix off by one error in activity log nil padding for month data (#15731)
⏫ 802ba78 iterate through all available logs for precomputation and query gets (#15768)
⏫ 1575454 refactor some code in modifyResponseMonths and ensure that the last mo… (#15767)
⏫ c88c73e Activity Log Filtering Limit Parameter (#16000)
⏫ cf60460 ActivityLog Implement HyperLogLog Store Functionality During Precomputation (#16146)
⏫ 2d12226 activity log refactoring port (#16162)
⏫ 7e72219 Port: Use Stored Hll to Compute New Clients For Current Month (#16184)
⏫ 614cee3 VAULT-6614 Enable role based quotas for lease-count quotas (OSS) (#16157)
⏫ 7140730 Current Month Activity Estimate, Probabilistic Tests, And Bugfixes (#16447)
⏫ ff504ad re-add namespace attribution to current month (#16473)
⏫ 687b3d1 oss port of vault-7225-bugfix (#16745)
❌ 89f08de HCP link integration (#16939)
8dedb31 Make some activity log tests less flaky (#17028)
❌ 8258b36 make proto (#17120)
❌ 72799f7 Update protos to match update of protobuf go library (#17215)
50a1f9e fix off by one err in current month client count computation (#17457)
❌ 0423ffb update protoc version to 3.21.7 oss (#17499)
❌ 483ef19 Eslint prefer-const (#17864)
840abfb Fix activity log end time (#17856)
87aa644 Don't return a 204 if there's no historical data (#17935)
❌ 186ee31 Link OSS (#18228)
b8de2c2 De-duplicate namespaces when historical and current month data are mixed (#18452)
cb61488 Account for mount counts when de-duplicating current and historical month data (#18598)
d641bbc Add new clients into the monthly breakdown (#18629)
2a5a07e Revert "Add new clients into the monthly breakdown (#18629)" (#18726)
771bd8b Add new clients into the monthly breakdown (#18766)
❌ 46b9921 Allow Token Create Requests To Be Replicated (#18689)
❌ fbed961 UI: combine current + history client count tabs into one dashboard (#17575)
b5d7d47 VAULT-13061: Fix mount path discrepancy in activity log (#18916)
a9e17c2 VAULT-13763 normalize activity log mount paths (#19343)
❌ 7ef7297 UI: Use specific date in clients activity test (#19419)
9f7f8d5 VAULT-13729 activity log test godocs (#19433)
❌ e55c18e adding copyright header (#19555)
e3c5977 Add no-op CensusAgent (#19625)
❌ e9d6dbc activitylog: Fix pq.Get trace logger output (#19650)
❌ bf2f1a8 UI: Fix flaky time-related tests (#19521)
b4fab6a VAULT-13191: OSS changes (#19891)
❌ 54904e4 VAULT-14733: Refactor processClientRecord in activity log (#19933)
d70c17f VAULT-14733: SegmentReader interface for reading activity log segments (#19934)
4b6ec40 Require activity log retention months at least the minimum (#20078)
05ba6bb api: Add reporting fields to activitylog config endpoint (#20086)
❌ c95d4fb VAULT-14734: activity log write endpoint (#20019)
❌ 75c903f openapi: Add display attributes for /sys (p2) (#19707)
002a59a Add minimum_retention_months to config endpoint (#20150)
77f83d9 Refactor reporter for unseal setup (#20296)
730d0e2 VAULT-14733: Split logic of precomputedQueryWorker (#20073)
❌ d234111 Start counting ACME certificate issuance as client activity (#20520)
35e2c16 VAULT-15703: Reload automated reporting (#20680)
❌ 6d95f8c Add client_type field to EntityRecord protobuf (#20626)
810d504 Add current_billing_period activity endpoint param (#20694)
5b23dd5 VAULT-14735: generate mock clients for activity log (#20252)
018ea84 VAULT-15395: Support mocking time functions in the activity log (#20720)
541f18e VAULT-14735: repeated and segmented activity log clients (#20699)
b4e2751 VAULT-14735: write mock activity log entity files (#20702)
dc5dd71 Deflake TestActivityLog_MultipleFragmentsAndSegments (#20930)
5002489 VAULT-15394: Generate activity log precomputed queries (#20778)