Better choice of distribution when multiple per repo (#4007)

when a repository has multiple distributions, UI will just use the first candidate
that leads to `inbound-*` distros being used instead of, say, `published`

change the logic to first search for distribution where the name matches the repo name (and is still associated with the right repo),
and only then fall back to the first candidate, but sorted so it will be the oldest distribution

Issue: AAH-2586

* add `repositoryBasePath(name, pulp_href?): Promise<string>`, replace `RepositoriesUtils.distributionByRepoName`
* use repositoryBasePath instead of manual or findDistroBasePathByRepo
* use helper in even more places
* rm unused api methods
* types cleanup, merge ansible repository and repository
* merge Repositories into AnsibleRepositoryAPI
* fix imports, lint. sort-exports, tests

(cherry picked from commit 367295f)

Author: himdel

CHANGES/2586.bug

@@ -0,0 +1 @@
+Better choice of distribution when multiple per repo

package.json

@@ -87,6 +87,7 @@
         "lint:yaml:setup": "pip install --upgrade yamllint",
         "prettier": "prettier --write 'src/**' 'config/**' 'test/**'",
         "prettier:check": "prettier -l 'src/**' 'config/**' 'test/**'",
+        "sort-exports": "perl -i -pe 's/^export/import/' src/**/index.ts ; npm run prettier ; perl -i -pe 's/^import/export/' src/**/index.ts",
         "start-pulp": "NODE_ENV=development API_PROXY_PORT=8080 API_BASE_PATH='/api/galaxy/' webpack serve --host 0.0.0.0 --config config/standalone.dev.webpack.config.js",
         "start-standalone": "NODE_ENV=development webpack serve --host 0.0.0.0 --config config/standalone.dev.webpack.config.js",
         "test": "npm run test-build && npm run test-run",