Increase delay of tooltip on show

What does this MR do?

Closes #1364 (closed). Increases the delay of gl-tooltip on show. This prevents the tooltip from showing when someone accidentally hovers a button, then the tooltip covering an adjacent button, like so:

The benefits of this solution:

• Helps prevent accidental hovers and tooltips covering adjacent buttons/links
• Gives the user enough time to mouse out of an element with a tooltip if accidentally hovered
• Still meets the accessibility success criteria for tooltips: https://www.w3.org/WAI/WCAG21/Understanding/content-on-hover-or-focus.html

Additional info:

• Issue with discussion: #1364 (closed).
• Integration branch: gitlab-ui-integration-1364-add-more-delay-tooltip
• Update to Pajamas documentation: gitlab-org/gitlab-services/design.gitlab.com!2325 (merged)
• Follow up MR to reduce pipeline tooltip delay: gitlab!59155 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines.
• GitLab UI's contributing guidlines.
• If it changes a Pajamas-compliant component's look & feel, the MR has been reviewed by a UX designer.
• If it changes GitLab UI's documentation guidelines, the MR has been reviewed by a Technical Writer.
• If the MR changes a component's API, integration MR(s) have been opened in the following projects to ensure that the @gitlab/ui package can be upgraded quickly after the changes are released:
  • GitLab: mr_url
  • CustomersDot: mr_url
  • Status Page: mr_url
• Added the ~"component:*" label(s) if applicable.

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• Security reports checked/validated by a reviewer from the AppSec team

Accessibility

If this MR adds or modifies a component, take a few moments to review the following:

• All actions and functionality can be done with a keyboard.
• Links, buttons, and controls have a visible focus state.
• All content is presented in text or with a text equivalent. For example, alt text for SVG, or aria-label for icons that have meaning or perform actions.
• Changes in a component’s state are announced by a screen reader. For example, changing aria-expanded="false" to aria-expanded="true" when an accordion is expanded.
• Color combinations have sufficient contrast.

Closes #1364 (closed)