[7.11] Increase the time needed to locate the save viz toast (#89301)

[stratoula]

Backports the following commits to 7.11:

• Increase the time needed to locate the save viz toast ([Functional tests] Increase the time needed to locate the save viz toast #89301)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 3154bdb

Metrics [docs]

Async chunks

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

id	before	after	diff
triggersActionsUi	1.5MB	1.5MB	-26.9KB

Page load bundle

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

id	before	after	diff
triggersActionsUi	162.3KB	162.4KB	+102.0B

Unknown metric groups

async chunk count

id	before	after	diff
triggersActionsUi	31	32	+1

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