🏃[e2e] Reorg helpers func

[fabriziopandini]

What this PR does / why we need it:
This PR is a big reshuffle of all the helpers defined in the E2E test framework so they are now consistently organized "by objects" (more detail in the issue)

No other changes were applied, except adding // Deprecated to few helpers that are not anymore in line with the recent changes in the test framework (eg. AssertAllClusterAPIResourcesAreGone ApplyYAMLURL are now deprecated).

All the deprecated helpers are now in a single deprecated.go file.

Which issue(s) this PR fixes:
Fixes #2921

xref #2753
xref #2637
xref #2636

/assign @vincepri
/assign @sedefsavas

[fabriziopandini]

@benmoss thanks for the feedback! fixed!

[vincepri]

/test pull-cluster-api-apidiff

[k8s-ci-robot]

@vincepri: The specified target(s) for /test were not found.
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• /test pull-cluster-api-make
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• /test pull-cluster-api-test
• /test pull-cluster-api-integration
• /test pull-cluster-api-capd-e2e

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In response to this:

/test pull-cluster-api-apidiff

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[vincepri]

/test pull-cluster-api-apidiff

[fabriziopandini]

/retest

[k8s-ci-robot]

@fabriziopandini: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-cluster-api-apidiff	87009ce	link	/test pull-cluster-api-apidiff

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[vincepri]

@fabriziopandini

sigs.k8s.io/cluster-api/test/framework
  Incompatible changes:
  - WatchControllerLogs: removed
  - WatchControllerLogsInput: removed

[fabriziopandini]

@vincepri Those functions were added by #2911 yesterday;
I'm renaming them into WatchDeploymentLogs and WatchDeploymentLogsInput because this is what they are really doing (nothing controller specific)

[vince]

@fabriziopandini wrong Vince!

[sedefsavas]

/lgtm

[vincepri]

/approve

[vincepri]

/milestone v0.3.4

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini, vincepri

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