Merge 'Technical Writing' SIG into TC

Nowadays, Technical Writing SIG is lacking maintainer and the
current Chair Stephen Finucane would not be able to continue
leading this SIG.

In TC weekly meetings and PTG[1], we decided to merge this
SIG responsibility in TC and a few repos which are related
to upstream institute training will be moved to First Contact
SIG.

One repo 'training-labs' is left for now, which will be called
for the maintainer, and if there is no one, we can retire it.
We are not even sure who is using it. Upstream training and CoA
do not use this repo.

[1] https://etherpad.opendev.org/p/tc-yoga-ptg
    http://lists.openstack.org/pipermail/openstack-discuss/2021-October/025554.html

Needed-By: https://review.opendev.org/c/openstack/governance-sigs/+/815868

Change-Id: Ie745e91e6a0edb8adf6ce5b36dbef22a338d8ca5

reference/sigs-repos.yaml

@@ -8,6 +8,10 @@ API:
 Automation:
   - repo: openstack/auto-scaling-sig
   - repo: openstack/self-healing-sig
+First Contact:
+  - repo: openstack/contributor-guide
+  - repo: openstack/training-guides
+  - repo: openstack/upstream-institute-virtual-environment
 Hardware Vendor:
   - repo: openstack/python-dracclient
 i18n:
@@ -79,13 +83,7 @@ Security:
   - repo: openstack/security-doc
   - repo: openstack/security-specs
 Technical Writing:
-  - repo: openstack/api-site
-  - repo: openstack/constellations
-  - repo: openstack/contributor-guide
-  - repo: openstack/openstack-manuals
   - repo: openstack/training-labs
-  - repo: openstack/training-guides
-  - repo: openstack/upstream-institute-virtual-environment
 Testing and Collaboration Tools:
   - repo: openstack/bugdaystats
   - repo: openstack/ci-log-processing

reference/technical-committee-repos.yaml

@@ -1,11 +1,14 @@
 ---
 # List of repositories owned by the technical committee
 Technical Committee:
+  - repo: openstack/api-site
+  - repo: openstack/constellations
   - repo: openstack/election
   - repo: openstack/goal-tools
   - repo: openstack/governance
   - repo: openstack/governance-website
   - repo: openstack/ideas
   - repo: openstack/openstack
+  - repo: openstack/openstack-manuals
   - repo: openstack/project-team-guide
   - repo: openstack/service-types-authority