google/cloud-core v1.46.0

Features

• Pubsub: Suppress errors for ack and modAck methods (#5240) (b9b2ae8)

Miscellaneous Chores

• move presubmit testing to github actions (#5294) (e693892)
• raise minimum versions of Guzzle in core (#5304) (48a345c), closes #5303
• support for phpdocumentor/reflection 4 in snippets (#5287) (3095675)