RF: Don't try to enable deploy runner on non-fsl/conda/ projects. Don't try and protect branches that don't exist

See merge request fsl/conda/fsl-ci-rules!162

and protect branches that don't exist

MNT: Change method of retrieving git hash

See merge request fsl/conda/fsl-ci-rules!161

"api/v4/projects/{pid}/repository/commits/{branchname}", as the latter
has been observed to have returned a commit which is not the most recent on
the branch

RF: Make create_conda_recipe easier to use

See merge request fsl/conda/fsl-ci-rules!160

master

it was not cleared

recipe/project repos don't need to exist

MNT: prefer mamba if installed

See merge request fsl/conda/fsl-ci-rules!159

MNT: handle pin_subpackage when loading metayaml

See merge request fsl/conda/fsl-ci-rules!158

MNT: Support for maintenance releases

See merge request fsl/conda/fsl-ci-rules!157

maint/<release-series> branches

MNT: Print base deps file for debugging. CUDA 11.0 image has been pulled

See merge request fsl/conda/fsl-ci-rules!156

BF: another typo

See merge request fsl/conda/fsl-ci-rules!155

Mnt/docker images change to mamba

See merge request fsl/conda/fsl-ci-rules!154

Mnt/docker images change to mamba

See merge request fsl/conda/fsl-ci-rules!153

BF: Gaargh! Don't use defaults channel

See merge request fsl/conda/fsl-ci-rules!152

BF: There may be more than one "latest" package

See merge request fsl/conda/fsl-ci-rules!151

built against different pyvers).

Enh/apply patch

See merge request fsl/conda/fsl-ci-rules!150

ENH: separate jobs to purge individual channel indexes

See merge request fsl/conda/fsl-ci-rules!149

MNT: allow deploy job for staging builds - packages will be published to dev channel

See merge request fsl/conda/fsl-ci-rules!148