chore(main): release 4.6.0

[release-please[bot]]

:robot: I have created a release beep boop

4.6.0 (2024-05-03)

Features

• Add apiVersion to x-goog headers (#1576) (2ed5cbb)
• Add new API version to protos (#1560) (9e2005f)
• Use ClientOptions gaxServerStreamingRetries value (#1571) (86e68d2)

Bug Fixes

• deps: Update dependency google-gax to ^4.3.2 (#1562) (1a5e5ae)
• deps: Update dependency google-gax to ^4.3.3 (#1583) (bb76ca8)
• Do not use gaxServerStreamingRetries for bidi or client streaming (#1575) (a69b8b6)

---

This PR was generated with Release Please. See documentation.