fix(deps): update module google.golang.org/grpc to v1.66.2

This MR contains the following updates:

Package	Type	Update	Change
google.golang.org/grpc	require	patch	v1.66.1 -> v1.66.2

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Release Notes

grpc/grpc-go (google.golang.org/grpc)

v1.66.2: Release 1.66.2

Compare Source

Dependencies

• Remove unintentional dependency on the testing package (#​7579)
• Remove unintentional dependency on the flate package (#​7595)
  • Special Thanks: @​ash2k

Bug Fixes

• client: fix a bug that prevented memory reuse after handling unary RPCs (#​7571)
  • Special Thanks: @​coxley

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