Remove delay when isAnimated: false. Fix Tooltip z-index

[envex]

What does this implement/fix?

BarChart would still have a staggered in animation even when isAnimated was false because we weren't setting the delay to 0.

Also fixes the tooltip z-index to match the polaris tooltip.

Resolves https://github.com/Shopify/core-issues/issues/63108

What do the changes look like?

Before

Screen.Recording.2023-11-14.at.1.14.39.PM.mov

After

Screen.Recording.2023-11-14.at.1.18.26.PM.mov

Storybook link

Note

There's an issue where we can't alter the controls in Storybook for some reason that I haven't dug into yet.

Before merging

• Check your changes on a variety of browsers and devices.

• Update the Changelog's Unreleased section with your changes.

• Update relevant documentation, tests, and Storybook.

• Make sure you're exporting any new shared Components, Types and Utilities from the top level index file of the package

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
polaris-viz-core-cjs	61.31 KB (+0.01% 🔺)	1.3 s (+0.01% 🔺)	891 ms (-27.16% 🔽)	2.2 s
polaris-viz-cjs	211.26 KB (+0.01% 🔺)	4.3 s (+0.01% 🔺)	2.1 s (-9.26% 🔽)	6.3 s
polaris-viz-esm	173.62 KB (+0.01% 🔺)	3.5 s (+0.01% 🔺)	1.4 s (+6.42% 🔺)	4.9 s
polaris-viz-css	4.57 KB (+0.18% 🔺)	92 ms (+0.18% 🔺)	256 ms (-14.22% 🔽)	348 ms
polaris-viz-esnext	178.73 KB (+0.01% 🔺)	3.6 s (+0.01% 🔺)	1.6 s (+5.89% 🔺)	5.2 s