Vue3: Finish the migration from v-tooltip library to floating-vue

[momesgin]

There's this migration documentation from the floating-vue library that lists the changes that we need to apply in order to complete the migration.

• All the class names from v-tooltip used in our css to customize the tooltips styling should be updated to the class names from floating-vue e.g. in https://github.com/rancher/dashboard/blob/master/shell/assets/styles/global/_tooltip.scss
  There's this PR that addresses some of the cases

• Update :popper-options="{modifiers: { flip: { enabled: false } } }" to :flip="false"

• Replace classes with popperClass

• Update trigger to :triggers

• Update open-group to show-group

• Address the two issues that are mentioned in the comments of this PR, 1. Tooltip's box-shadow 2. Todo comment

• Fix LocaleSelector dropdown
  result:
  
  expected:
  

• Fix Tooltip's content including pre tags
  result:
  
  expected:
  

• Fix ContainerLogs dropdown
  result:
  
  expected:
  

[izaac]

This is part of the non functional updates dor the vue2 to vue3 upgrade, and is already covered on other referenced epic/issues