Adaptations of the MAC scheduling to support FDD

• removed calls to the TDD UL/DL configuration common in FDD mode
• bugfix in the generation of prach info from index
• initial adaptation of gNB schedulers
• made the use of nr_slots_per_frame more consistent

added 5G-NR label

requested review from @schmidtr

OAI RAN-CI-develop build (2464): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

OAI RAN-CI-develop build (2464): failed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/2464/)

OAI RAN-Container-Parent build (1106): passed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/1106/)

added 19 commits

• 9f9fdb95...ee3a256b - 18 commits from branch develop
• 64b7741c - Merge remote-tracking branch 'origin/develop' into nr-fdd-scheduling

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OAI RAN-CI-develop build (2482): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

OAI RAN-CI-develop build (2482): failed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/2482/)

OAI RAN-Container-Parent build (1125): passed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/1125/)

added 37 commits

• 64b7741c...3ea34db9 - 36 commits from branch develop
• 36ffa3ff - Merge remote-tracking branch 'origin/develop' into nr-fdd-scheduling

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OAI RAN-CI-develop build (2508): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

OAI RAN-CI-develop build (2508): failed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/2508/)

OAI RAN-Container-Parent build (1156): passed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/1156/)

added 1 commit

• c713d499 - bugfix

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OAI RAN-CI-develop build (2511): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

OAI RAN-Container-Parent build (1159): failed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/1159/)

OAI RAN-CI-develop build (2511): passed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/2511/)

added 66 commits

• c713d499...264e8299 - 65 commits from branch develop
• 2593a821 - Merge remote-tracking branch 'origin/develop' into nr-fdd-scheduling

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OAI RAN-Container-Parent build (1168): failed (https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/1168/)

OAI RAN-CI-develop build (2519): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules