chore: wait to input the name of the segment when checking for error …

…messages (#7377)

This change adds a wait statement before entering the name of the
segment when checking for error messages that this segment name
already exists.

This is the same workaround that we did in
#7289, which seems to have
worked.

Like in that PR, using waits is still an antipattern, but it appears
to be working.

Maybe it’s time to look more deeply at why it happens? Why isn’t the
field ready to receive input even though it’s on the page? Is it mui’s
fault or ours?

frontend/cypress/integration/segments/segments.spec.ts

@@ -24,6 +24,7 @@ describe('segments', () => {
 
     it('gives an error if a segment exists with the same name', () => {
         cy.get("[data-testid='NAVIGATE_TO_CREATE_SEGMENT']").click();
+        cy.wait(500);
         cy.get("[data-testid='SEGMENT_NAME_ID']").type(segmentName);
         cy.get("[data-testid='SEGMENT_NEXT_BTN_ID']").should('be.disabled');
         cy.get("[data-testid='INPUT_ERROR_TEXT']").contains(