feat: support asset selection by external id

[mixu3]

What this PR does / why we need it:

Currently, the user is required to input only the asset id in uuid format in order to select the asset in a query. If any user tries to enter an external id, the query will not be able to find timeseries data since the dataplane does not support external ids yet.

This change allows users to select assets by external ids and retrieve the timeseries data.

Screen.Recording.2025-01-15.at.1.16.41.PM.mov

In addition, a tooltip for the asset field teaches users how to enter the asset id. Users can learn more about SiteWise external ids by clicking on the API docs button.

Which issue(s) this PR fixes:

Fixes #351

Testing:

• Unit tests passing
• Manually testing these steps:
  • Typing in externalId:... retrieves the correct asset
  • Typing in the assetId in uuid format retrieves the correct asset (no change from previous behavior)
  • Typing in a string not in uuid format appends the externalId: prefix to retrieve the correct asset
  • Running queries on all three user inputs above loads the correct data
  • Successfully loads asset in query variable

[CLAassistant]

All committers have signed the CLA.

[hwandersman]

Things to consider to ensure customers will understand this change:

1. Label on the asset dropdown - should it still always be "Asset ID"?

2. Info icon on the Asset section with a description about how to select or enter an assetId. See an example for "Property Alias" here:

[mixu3]

Things to consider to ensure customers will understand this change:

1. Label on the asset dropdown - should it still always be "Asset ID"?
   ...
2. Info icon on the Asset section with a description about how to select or enter an assetId.
   ...

After talking with UX, we agreed that we will keep the label as "Asset ID" but add an info icon to tell users how to enter the ID (UUID format or appending the prefix externalId:).

[idastambuk]

I haven't tested this, but I assume that if the user is using a template variable, i.e $myAssetId, then this will append the externalId to it, which we don't want. The easiest solution to this would probably be to add a check for startsWith($)

[chejimmy]

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