[fix][broker]Support to migrate topics from blue to green cluster per namespace

[vraulji567]

Motivation

Currently the blue-green migration functionality is available at the cluster level. Need a controlled strategy to migrate the topics at namespace level.

Modifications

Add config to namespace policy to enable topic migration at the namespace level.
./bin/pulsar-admin namespaces update-migration-state $namespace --migrated

Result

Once the namespace migration is enabled, all the topics within the namespace will be migrated to the green cluster.

Verifying this change

• Make sure that the change passes the CI checks.

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

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

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository:

[codecov-commenter]

Codecov Report

Merging #21367 (1658b5c) into master (d09642c) will decrease coverage by 0.13%.
The diff coverage is 76.74%.

@@             Coverage Diff              @@
##             master   #21367      +/-   ##
============================================
- Coverage     73.36%   73.24%   -0.13%     
- Complexity     3827    32564   +28737     
============================================
  Files          1888     1888              
  Lines        140340   140371      +31     
  Branches      15437    15438       +1     
============================================
- Hits         102958   102812     -146     
- Misses        29298    29475     +177     
  Partials       8084     8084              

Flag	Coverage Δ
inttests	24.20% <13.95%> (-0.09%)	⬇️
systests	24.71% <13.95%> (-0.01%)	⬇️
unittests	72.55% <76.74%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.../org/apache/pulsar/broker/admin/v2/Namespaces.java	68.38% <100.00%> (+0.09%)	⬆️
...rg/apache/pulsar/broker/service/AbstractTopic.java	87.73% <100.00%> (+0.52%)	⬆️
...ava/org/apache/pulsar/broker/service/Consumer.java	86.23% <100.00%> (ø)
...va/org/apache/pulsar/broker/service/ServerCnx.java	72.00% <100.00%> (ø)
...oker/service/nonpersistent/NonPersistentTopic.java	73.05% <100.00%> (ø)
...ava/org/apache/pulsar/client/admin/Namespaces.java	66.66% <ø> (ø)
...g/apache/pulsar/common/policies/data/Policies.java	59.09% <ø> (ø)
...e/pulsar/client/admin/internal/NamespacesImpl.java	95.65% <100.00%> (+0.03%)	⬆️
.../java/org/apache/pulsar/admin/cli/CmdClusters.java	74.07% <ø> (ø)
...sar/broker/service/persistent/PersistentTopic.java	79.61% <50.00%> (+0.15%)	⬆️
... and 3 more

... and 77 files with indirect coverage changes