chore(deps): bump ajv and @typespec/compiler in /eng/common/tsp-client (#7462)

Bumps [ajv](https://github.com/ajv-validator/ajv) and [@typespec/compiler](https://github.com/microsoft/typespec). These dependencies needed to be updated together.

Updates `ajv` from 8.17.1 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.17.1...v8.18.0)

Updates `@typespec/compiler` from 1.4.0 to 1.10.0
- [Release notes](https://github.com/microsoft/typespec/releases)
- [Commits](https://github.com/microsoft/typespec/compare/typespec-stable@1.4.0...typespec-stable@1.10.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: indirect
- dependency-name: "@typespec/compiler"
  dependency-version: 1.10.0
  dependency-type: indirect
...

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Author: dependabot[bot]