Improved fuseToMetaOps to set backend of fused meta op

Partially fixes #163 (closed).

Note that currently, nested meta-ops scheduling is not well supported!

added Fix 🔥🔥 label

assigned to @olivierbichler

added 16 commits

• 17158e5a...dcdb722d - 15 commits from branch dev
• 649254e5 - Improved fuseToMetaOps to set backend of fused meta op

Compare with previous version

enabled an automatic merge when the pipeline for 649254e5 succeeds

mentioned in issue #163 (closed)

aborted the automatic merge because source branch was updated

added 1 commit

• b9a079ad - Fix oversight

Compare with previous version

enabled an automatic merge when the pipeline for b9a079ad succeeds

mentioned in commit 1f26e48b

merged