Sort experiments by descending creation date by default in katib-ui

[Doris-xm]

What this PR does / why we need it:
Showing experiments from newest to oldest by default instead of sorting them by name.
Now the experiments are initially shown as follows:

Which issue(s) this PR fixes :
Fixes #2475

Checklist:

• Docs included if any changes are user facing

[Doris-xm]

It seems that an existing CI test checks if the experiment names are rendered in a alphabetical order:

katib/pkg/ui/v1beta1/frontend/cypress/e2e/index-page.cy.ts

Lines 30 to 42 in 93bee4d

	it('renders every Experiment name into the table', function () {
	cy.visit('/');
	cy.wait(['@mockNamespacesRequest', '@mockExperimentsRequest']);
	let i = 0;
	const experiments = this.experimentsRequest;
	// Table is sorted by Name in ascending order by default
	// and experiment objects are also sorted alphabetically by name
	cy.get(`[data-cy-resource-table-row="Name"]`).each(element => {
	expect(element).to.contain(experiments[i].name);
	i++;
	});
	});

which conflicts with this pr. I'm wondering if we need to change the test.

[Electronic-Waste]

@Doris-xm Yeah, I think we need to change the test.

[Doris-xm]

/rerun-all

[Doris-xm]

/rerun-all

[Electronic-Waste]

LGTM! Thanks for updating this @Doris-xm. I'll leave it for other maintainers.

/lgtm
/assign @kubeflow/wg-automl-leads @helenxie-bit

[helenxie-bit]

Thanks for the contribution!

/lgtm
/assign @kubeflow/wg-automl-leads @kimwnasptd

[andreyvelich]

Thanks for this contribution @Doris-xm!
/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andreyvelich, Electronic-Waste

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/ui/v1beta1/OWNERS [andreyvelich]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment