Fix AssertFatal in Msg3

Fix AssertFatal in Msg3 to not Assert when there is a PUCCH (CSI report) already scheduled for that slot

changed milestone to %REVIEW_CAN_START

added 5G-NR label

requested review from @francescomani

added bugfix label

This should fix #560 (closed)

OAI RAN-CI-develop build (4035): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

OAI RAN-CI-develop build (4035): passed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/4035/)

OAI RAN-Container-Parent build (2652): failed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/2652/)

Don't know why CI failed both in SA and NSA but I guess it is unrelated

changed milestone to %REVIEW_COMPLETED_AND_APPROVED

added 1 commit

• 91786489 - Address review comments

Compare with previous version

mentioned in issue #560 (closed)

OAI RAN-CI-develop build (4040): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

resolved all threads

OAI RAN-CI-develop build (4040): passed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/4040/)

OAI RAN-Container-Parent build (2657): passed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/2657/)

resolved all threads

changed milestone to %OK_TO_BE_MERGED

mentioned in merge request !1689 (merged)