API for exposing query analysis (#3276)

* Add API signature

* Implement AnalyzeQuery (wip)

* Implement AnalyzeQuery, part 2 (wip)

* Fix bug

* Fix bug

* Reorder query scopes

* Add queries series stat

* Add queried series stat (take 2)

* Improve naming, query matchers handling

* Simplify querier logic, add deduplication flag

* Add basic validation

* Add basic validation (fix compile error)

* Only return query scopes that are in use

* Revert "Only return query scopes that are in use"

This reverts commit 649c2cce206e95d01ab0a80b6f15450d96b38d97.

* Improve readability, add unit tests, fix broken unit tests

* Remove unused fields in proto spec

* Revert undesired change

* Improve method name

* Revert undesired change

* Improve naming consistency

* Remove unused function

* Speed up reference-help target

* Add per-tenant overrides for query analysis

* Change default config value for query_analysis_series_enabled

* Update reference help

* Improve naming consistency, fix flaky test

* Revert change to ebpf/testdata

Makefile

@@ -250,7 +250,7 @@ clean: ## Delete intermediate build artifacts
 
 .PHONY: reference-help
 reference-help: ## Generates the reference help documentation.
-reference-help: build
+reference-help: go/bin
 	@(./pyroscope -h || true) > cmd/pyroscope/help.txt.tmpl
 	@(./pyroscope -help-all || true) > cmd/pyroscope/help-all.txt.tmpl