[azkeys] add fakes support

[gracewilcox]

Part of #23355

[Copilot]

Pull Request Overview

Adds fakes support for the Key Vault Keys client, updates request transforms for optional versions, and bumps several module versions.

• Introduce a fake package with server and tracker utilities.
• Update regex-based transforms and client span instrumentation to handle optional version path parameters.
• Bump azidentity, internal Key Vault packages, Go module dependencies, and emitter version.

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tsp-location.yaml	Updated commit hash for API spec
go.mod (perf testdata & root)	Bumped azidentity, internal KV modules, and x/* deps
internal/transforms.go	Adjusted regex transforms for optional version paths
fake/internal.go	Added tracker, error types, and helper functions
fake/custom_server.go	Initialized fake challenge interceptor
client.go	Added operationName to context and enhanced spans
_metadata.json	Bumped emitterVersion
testdata/perf go.mod (azcertificates)	Bumped azidentity and x/* dependencies

Comments suppressed due to low confidence (2)

sdk/security/keyvault/azkeys/fake/internal.go:27

• There are no tests covering the new contains, newTracker, and tracker methods; consider adding unit tests to ensure correct behavior of the fake utilities.

func contains[T comparable](s []T, v T) bool {

[gracewilcox]

/go - pullrequest