Removes experimental moniker and changes
makefiles/package scripts to build pmem2 by default.

Merge branch stable-1.9 into master

common: revert Disable SDS if is not supported #4896

pmem2: source get fd/handle

this commit reverts all changes from:
revert Disable SDS if is not supported #4896
and all previous reverts/fixes to this feature:
test: fix sds support check in pmempool_feature #4995
pool: remove sds extraneous #4996

Support for SDS in powerpc should be implemented by modifying
pmem2_source_device_usc() function to return PMEM2_E_NOSUPP on
powerpc platform.

Revert "pool: remove sds extraneous"
This reverts commit 493ee83f.

Revert "test: fix sds support check in pmempool_feature"
This reverts commit 11318a92.

Revert "test: Fix pmempool_sync_remote/TEST21 when SDS is not supported"
This reverts commit 8c9361e1.

Revert "test: fix pmempool_check/TEST33 when sds is not supported"
This reverts commit 0d98c1df.

Revert
"test: add SDS not supported optional line on pmempool check tests"
This reverts commit 3b4d7529.

Revert "pool: disable SDS check if not supported"
This reverts commit eb7822f5.

Revert "test: fix util_pooset tests to work without SDS"
This reverts commit d29eb2ed.

Revert "test: fix pmempool_info/TEST14 to work without SDS"
This reverts commit fb6445d2.

Revert "test: Fix obj_sds to always have SDS"
This reverts commit a6d76e26.

Revert "test: skip pmempool_feature if SDS cannot be enabled"
This reverts commit d4b31aa9.

Revert "common: Add runtime SDS check and disable"
This reverts commit ac3da3a2.

Merge pull request #5013 from pmem/revert-5009-common-migrate-from-Docker-Hub-to-GitHub-Container-Registry

Revert "common: migrate from Docker Hub to GitHub Container Registry"

common: migrate from Docker Hub to GitHub Container Registry

test: store logs in separate folders

common: add repology badge to README

pmem2: move reservation struct to vm_reservation.c

Merge stable-1.9 into master 

pool: remove sds extraneous

doc: tiny man page fixes

test: fix sds support check in pmempool_feature

pmem2: fix vm_reservation TEST29 bugs

test: more scope fixes

Due to possible races and bugs when mapping asynchronously to the
virtual memory reservation, rw_locks were added in the
pmem2_map_new/delete functions. Locks are invoked only when the
reservation is set in the config structure.

test: fix pmem2 example without libndctl

test: fix symbol format in the scope tests

doc: add missing libpmem2 functions in gitignore

pmem2: add pmem2_map_from_existing function