Prefer native type check methods over lodash's

The following discussion from !3305 (merged) should be addressed:

• @markrian started a discussion:

  thought: We should probably replace all uses of this with Array.isArray, but that's outside the scope of this MR.

---

Implementation plan

• Replace all usages of lodash's isArray with the native Array.isArray method.
• Replace all usages of lodash's isFinite with the native Number.isFinite method.
• We may want to look into installing eslint-plugin-you-dont-need-lodash-underscore to ensure we're always favoring native methods. Should probably be done in https://gitlab.com/gitlab-org/frontend/eslint-plugin.

/cc @svedova @markrian