Implement Update mutation function

[GHX5T-SOL]

Fixes #1000

Summary:

• adds the interpreter Update mutation function and registers it with mutation functions
• builds a full replacement record so omitted fields are blanked during replacement
• adds indexed collection update support for Update(..., ..., ..., "ALL") so each matching row is replaced once
• adds V1/V1-disabled mutation script coverage and a primary-key all-match regression

Validation:

• DOTNET_CLI_TELEMETRY_OPTOUT=1 DOTNET_ROOT=/Users/brucewayne/Money-MacMini/.dotnet PATH=/Users/brucewayne/Money-MacMini/.dotnet:$PATH dotnet test src/tests/.Net7.0/Microsoft.PowerFx.Interpreter.Tests/Microsoft.PowerFx.Interpreter.Tests.csproj --filter "FullyQualifiedName~RunMutationTests|FullyQualifiedName~UpdateAllUpdatesEachPrimaryKeyMatchOnce" /p:EnableSourceControlManagerQueries=false --no-restore
  • Passed: 55, Failed: 0, Skipped: 0
  • SourceLink warnings only, because local SCM queries were disabled to avoid Microsoft.Build.Tasks.Git failing on this worktree with Unsupported repository version 1.
• git diff --check
• git diff --binary | gitleaks stdin --redact --no-banner
  • no leaks found

[GHX5T-SOL]

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