Upgrade @typespec/compiler version to next

[v-jiaodi]

Description:
Upgrade @typespec/compiler version to next causing LoadTestService generation failure

repro step:

1. Update package.json as follow:

{
  "name": "azure-rest-api-specs",
  "devDependencies": {
    "@azure-tools/typespec-apiview": "0.4.9",
    "@azure-tools/typespec-autorest": "0.45.0-dev.3",
    "@azure-tools/typespec-azure-core": "0.45.0-dev.3",
    "@azure-tools/typespec-azure-portal-core": "0.44.0",
    "@azure-tools/typespec-azure-resource-manager": "0.45.0-dev.4",
    "@azure-tools/typespec-azure-rulesets": "0.45.0-dev.1",
    "@azure-tools/typespec-client-generator-cli": "0.9.3",
    "@azure-tools/typespec-client-generator-core": "0.45.0-dev.5",
    "@azure/avocado": "^0.8.4",
    "@typespec/compiler": "0.59.0-dev.7",
    "@typespec/http": "0.59.0-dev.4",
    "@typespec/openapi": "0.59.0-dev.1",
    "@typespec/openapi3": "0.58.0",
    "@typespec/rest": "0.59.0-dev.1",
    "@typespec/versioning": "0.59.0-dev.3",
    "azure-rest-api-specs-eng-tools": "file:eng/tools",
    "oav": "^3.3.7",
    "prettier": "~3.2.5",
    "typescript": "~5.4.5"
  },
  "private": true
}

2. Run npm i -g @typespec/compiler and npm i
3. Enter the specification/loadtestservice/LoadTestService folder, and run npx tsp compile client.tsp

Error log:

[openapi-pipeline-app]

Next Steps to Merge

Next steps that must be taken to merge this PR:

• ❌ The required check named TypeSpec Requirement (resource-manager) has failed. TypeSpec usage is required for all new (aka "greenfield") services. The automation detected this pull request adds at least one new service that is violating this requirement. For information on converting from OpenAPI specs to TypeSpec specs or on data-plane (DP) policies, refer to aka.ms/azsdk/typespec. If you have general questions on resource provider (RP) policies, refer to aka.ms/rphelp
• ❌ The required check named TypeSpec Validation has failed. Refer to the check in the PR's 'Checks' tab for details on how to fix it and consult the aka.ms/ci-fix guide

Important checks have failed. As of today they are not blocking this PR, but in near future they will.
Addressing the following failures is highly recommended:

• ⚠️ The check named TypeSpec Requirement (data-plane) has failed. TypeSpec usage is required for all new (greenfield) services. This is currently enforced as a warning for data-plane specs, but will be made a blocking error in the near future. For information on converting from OpenAPI specs to TypeSpec specs or on data-plane (DP) policies, refer to aka.ms/azsdk/typespec. If you have general questions on resource provider (RP) policies, refer to aka.ms/rphelp

[openapi-pipeline-app]

PR validation pipeline started successfully. If there is ApiView generated, it will be updated in this comment.

[timotheeguerin]

Fix in this pr #30005