fix: Pin @opentelemetry/api to 1.9.0 across all SDK packages

[github-actions]

Note

The pull request "fix: Pin @opentelemetry/api to 1.9.0 across all SDK packages" was created by @logaretm but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

Summary

• @opentelemetry/api@1.9.1 was released on Mar 25 and introduced export { Foo, type Bar } syntax (inline type modifiers) in its .d.ts files, which requires TypeScript 4.5+
• Our SDK packages declare "@opentelemetry/api": "^1.9.0", so users installing Sentry SDKs would transitively resolve to 1.9.1
• Users with skipLibCheck: false and TypeScript < 4.5 would get type errors from OTel's types
• This pins @opentelemetry/api to exactly 1.9.0 (no caret) in all 13 affected SDK packages

[linear-code]

JS-2009

[logaretm]

closed by #19992