Lock unlock protocol flags

[eric-sap]

Subtask of #588 to add locks to ConsumerGroupAsyncCommands (dispatcher side)

Proposed Changes
🎁. Added functionality to the managedGroup (resetLockTimer/canUnlock/removeLock) to allow locking and unlocking of a managedGroup via an arbitrary token.
🎁 Changed the stopConsumerGroup and startConsumerGroup functions to call processLock, which understands the fields in the new CommandLock struct of the ConsumerGroupAsyncCommand and will lock/unlock the managedGroup
🧽 Change the Reconfigure function to also obey the managedGroup lock/unlock using an internal CommandLock token

The ResetOffset Controller is still "inactive" and has not been added to any Channels/Sources/etc.
The ResetOffset Controller is still not "complete" and this is a stepping stone in the path to implementing the feature.

Release Note
Release Notes will be provided near the end of the ResetOffset feature development.

Docs
Documentation will be provided near the end of the ResetOffset feature development.

[codecov]

Codecov Report

Merging #742 (f487b46) into main (000dd9c) will increase coverage by 0.34%.
The diff coverage is 78.23%.

@@            Coverage Diff             @@
##             main     #742      +/-   ##
==========================================
+ Coverage   75.29%   75.64%   +0.34%     
==========================================
  Files         132      140       +8     
  Lines        5785     6307     +522     
==========================================
+ Hits         4356     4771     +415     
- Misses       1208     1316     +108     
+ Partials      221      220       -1     

Impacted Files	Coverage Δ
...onsolidated/dispatcher/consumer_message_handler.go	0.00% <0.00%> (ø)
.../channel/distributed/controller/util/dispatcher.go	100.00% <ø> (ø)
pkg/source/adapter/adapter.go	58.42% <ø> (-1.08%)	⬇️
pkg/source/client/client.go	15.66% <0.00%> (-19.48%)	⬇️
pkg/source/reconciler/source/kafkasource.go	0.00% <0.00%> (ø)
pkg/source/mtadapter/adapter.go	47.82% <22.72%> (-27.36%)	⬇️
pkg/apis/sources/v1beta1/kafka_lifecycle.go	53.33% <50.00%> (-0.52%)	⬇️
pkg/channel/consolidated/utils/util.go	95.91% <50.00%> (-4.09%)	⬇️
pkg/source/client/offsets.go	60.00% <60.00%> (ø)
pkg/channel/consolidated/dispatcher/dispatcher.go	61.58% <66.66%> (+0.10%)	⬆️
... and 31 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 36d50bf...f487b46. Read the comment docs.

[matzew]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eric-sap, matzew

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [eric-sap,matzew]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment