upgrade grpc to 1.57.0

[wu-hui]

No description provided.

[google-oss-bot]

	1 Warning
⚠️	Did you forget to add a changelog entry? (Add #no-changelog to the PR description to silence this warning.)

Generated by 🚫 Danger

[ncooke3]

LGTM on green. We can grab the binary artifacts from the resulting nightlies, and update tomorrow.

[paulb777]

Looks like something about the new Boring SSL doesn't work in CocoaPods.

[wu-hui]

Looks like something about the new Boring SSL doesn't work in CocoaPods.

Yep..checking with grpc

[google-oss-bot]

Coverage Report ¹

Affected Products

• FirebaseFirestore-iOS-FirebaseFirestore.framework

  Overall coverage changed from 88.11% (acfd28c) to 88.21% (2de342d) by +0.10%.

  Filename	Base (acfd28c)	Merge (2de342d)	Diff
  exception.cc	23.68%	84.21%	+60.53%
  filesystem_posix.cc	79.09%	81.82%	+2.73%
  leveldb_key.cc	98.82%	98.14%	-0.69%
  leveldb_remote_document_cache.cc	94.83%	96.55%	+1.72%
  task.cc	93.91%	96.52%	+2.61%

Test Logs

• Base (acfd28c): https://github.com/firebase/firebase-ios-sdk/actions/runs/6053604508
• Merge (2de342d): https://github.com/firebase/firebase-ios-sdk/actions/runs/6085712370

1. https://storage.googleapis.com/firebase-sdk-metric-reports/diBu7KXAfL.html

[paulb777]

Closing since we've now updated to 1.62.*