Upgrade Avro Dependency to 1.12.1

[danielrod08]

What is the purpose of the change

This pull request upgrades the Apache Avro dependency from version 1.11.4 to 1.12.1 in order to support nanosecond-precision (as described in this PR #27770).

Brief change log

• Modified pom.xml and NOTICE files to upgrade the Avro Version

Verifying this change

This change is a trivial version upgrade.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): yes
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not applicable

[talatuyarer]

@mxm @gyfora could you review this ?

[flinkbot]

CI report:

• 2bc8b94 UNKNOWN
• 99d6ed0 UNKNOWN

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[mxm]

Thanks @danielrod08! Is this an API-only change which will not impact the wire format?

[mxm]

Not sure how this can work, why are we omitting Fixed2?

[mxm]

Why does the change affect both bytes and fixed type?

[danielrod08]

Hi @mxm, thank you for the comment.
I accidentally set to true in the pom.xml. This caused the generated User class to only accept BigDecimal values for both setTypeDecimalFixed and setTypeDecimalBytes. I am currently removing this configuration and resolving the resulting issues, and reversing the changes I made to the tests.

[mukul-8]

Thanks for the effort @danielrod08. Just a heads up — there's already an open PR for the Avro 1.12.1 version bump: #27806 by @snuyanzin, which addresses FLINK-39283. That PR covers the same upgrade, so this one may not be needed. It might be worth coordinating there instead.