Add command to inspect vault snapshots

[elliesterner]

Pulled logic extensively from consul snapshot inspector.

Note: we are only verifying the unsealed sha sum, and not the sealed sum.

Example:

$ vault operator raft snapshot inspect -details -depth 2 complete.snap
 ID           bolt-snapshot
 Size         449106
 Index        592
 Term         3
 Version      1


 Key Name                                          Count      Size
 ----                                              ----       ----
 sys/token                                         365        173.2KB
 sys/expire                                        181        246KB
 logical/4424d327-7320-7eed-6955-7cf9554ab30e      7          6.2KB
 auth/ba6064c0-7b95-c9ab-42b5-59139a68d169         5          1.7KB
 sys/policy                                        3          3.2KB
 core/cluster                                      2          236B
 auth/55812375-d035-ee8c-bd40-40af00c21de6         1          462B
 core/audit                                        1          104B
 core/auth                                         1          540B
 core/hsm                                          1          112B
 core/index-header-hmac-key                        1          99B
 core/keyring                                      1          320B
 core/leader                                       1          1.5KB
 core/local-audit                                  1          110B
 core/local-auth                                   1          108B
 core/local-mounts                                 1          357B
 core/lock                                         1          49B
 core/master                                       1          163B
 core/mounts                                       1          495B
 core/raft                                         1          1.6KB
 core/seal-config                                  1          136B
 core/shamir-kek                                   1          84B
 core/versions                                     1          167B
 core/wrapping                                     1          560B
 ----                                              ----
 Total Size                                                437.5KB

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[github-actions]

Build Results:
All builds succeeded! ✅

[github-actions]

CI Results:
All Go tests succeeded! ✅

[jasonodonnell]

In your example above I see there are flags available but the helper description makes no mention of them:

[~] vault operator raft snapshot inspect -h
Usage: vault operator raft snapshot inspect <snapshot_file>

	Inspects a snapshot file.

	$ vault operator raft snapshot inspect raft.snap

[elliesterner]

In your example above I see there are flags available but the helper description makes no mention of them:

[~] vault operator raft snapshot inspect -h
Usage: vault operator raft snapshot inspect <snapshot_file>

	Inspects a snapshot file.

	$ vault operator raft snapshot inspect raft.snap

thank you!! I fixed this :)

[ncabatoff]

These consts can go away now right?

[tsaarni]

Hi @elliesterner, @jasonodonnell, @ncabatoff It seems that backports of this PR (among some others) brought BUSL license to MPL branches 1.13.x and 1.14.x.

Has there been any discussion how to solve the license conflict?

[mladlow]

@elliesterner next time please use the correct new feature formatting for new features in the changelog.

[mladlow]

To add some more clarification - this should use the "Feature Name" we'd use in the release notes, and should try to communicate to the user why they would want to learn more about this brand new feature we're introducing in Vault 1.16.

[elliesterner]

Thanks @mladlow . I thought I had corrected this here?

[mladlow]

@elliesterner I see the PR, thanks! I think the correction didn't get merged to the 1.16 release branch, so on the 1.16 release branch it still has the original text. It's still being generated with this text. I added the backport label to the PR you linked. Could you please help ensure the 1.16 backport PR merges?

[elliesterner]

oops, yes will fix. Thank you!