protect AsgMessagingForward in AthenaMT

In MT the MsgStream object is thread-local. So instead of retrieving the MsgStream& object once, this will retrieve it on every use.

cc @tadej

This merge request affects 1 package:

• Control/AthToolSupport/AsgMessaging

Adding @krumnack ,@ssnyder as watchers

added Core master review-pending-level-1 labels

CI Result FAILURE (hash f394175d)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 22351]

Jenkins please retry a build

This merge request affects 1 package:

• Control/AthToolSupport/AsgMessaging

Adding @krumnack ,@ssnyder as watchers

CI Result FAILURE (hash f394175d)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 22355]

mentioned in merge request !37486 (merged)

Jenkins please retry a build

This merge request affects 1 package:

• Control/AthToolSupport/AsgMessaging

Adding @krumnack ,@ssnyder as watchers

CI Result SUCCESS (hash f394175d)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 22363]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 49febeb6

added sweep:ignore label