[7.x] [canvas] Create Expressions Service; remove legacy service (#107350)

[kibanamachine]

Backports the following commits to 7.x:

• [canvas] Create Expressions Service; remove legacy service ([canvas] Create Expressions Service; remove legacy service #107350)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 41b4945
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
canvas	991	992	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
canvas	1.5MB	1.5MB	-1.7KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
canvas	26.1KB	27.0KB	+891.0B

Unknown metric groups

References to deprecated APIs

id	before	after	diff
canvas	53	50	-3

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @clintandrewhall