Fix GCC build errors in PCA example

[Vika-F]

Add missing copy constructor or assignment operators to fix GCC "implicitly-declared operator= is deprecated" and similar errors in pca_cor_dense_batch example.

---

PR should start as a draft, then move to ready for review state after CI is passed and all applicable checkboxes are closed.
This approach ensures that reviewers don't spend extra time asking for regular requirements.

You can remove a checkbox as not applicable only if it doesn't relate to this PR in any way.
For example, PR with docs update doesn't require checkboxes for performance while PR with any change in actual code should have checkboxes and justify how this code change is expected to affect performance (or justification should be self-evident).

Checklist to comply with before moving PR from draft:

PR completeness and readability

• I have reviewed my changes thoroughly before submitting this pull request.
• I have commented my code, particularly in hard-to-understand areas.
• Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
• I have added a respective label(s) to PR if I have a permission for that.
• I have resolved any merge conflicts that might occur with the base branch.

Testing

• I have run it locally and tested the changes extensively.
• All CI jobs are green or I have provided justification why they aren't.

[david-cortes-intel]

@Vika-F I understand some of the CI jobs here should be compiling and running the examples where this issue was found.

Could this problematic behavior be replicated in the CI jobs? For example, by passing flag -Werror=deprecated-copy or similar.

Would be ideal to first create a CI reproducer to make sure that this PR fixes the issue, and to ensure that there aren't other similar issues coming from other examples.

[Vika-F]

@david-cortes-intel
created a reproducer here #3039

[Vika-F]

/intelci: run

[david-cortes-intel]

I am not seeing the earlier compiler error in GCC==11.3 under this PR. Looks like it's working.