)

This change introduces a refactor of the devcontainers recreation logic
which is now handled asynchronously rather than being request scoped.
The response was consequently changed from "No Content" to "Accepted" to
reflect this.

A new `Status` field was introduced to the devcontainer struct which
replaces `Running` (bool). This reflects that the devcontainer can now
be in various states (starting, running, stopped or errored).

The status field also protects against multiple concurrent recrations,
as long as they are initiated via the API.

Updates #16424

Closes #17988

Define `preset_hard_limited` metric which for every preset indicates
whether a given preset has reached the hard failure limit (1 for
hard-limited, 0 otherwise).

CLI example:
```
curl -X GET localhost:2118/metrics | grep preset_hard_limited
# HELP coderd_prebuilt_workspaces_preset_hard_limited Indicates whether a given preset has reached the hard failure limit (1 for hard-limited, 0 otherwise).
# TYPE coderd_prebuilt_workspaces_preset_hard_limited gauge
coderd_prebuilt_workspaces_preset_hard_limited{organization_name="coder",preset_name="GoLand: Large",template_name="Test7"} 1
coderd_prebuilt_workspaces_preset_hard_limited{organization_name="coder",preset_name="GoLand: Large",template_name="ValidTemplate"} 0
coderd_prebuilt_workspaces_preset_hard_limited{organization_name="coder",preset_name="IU: Medium",template_name="Test7"} 1
coderd_prebuilt_workspaces_preset_hard_limited{organization_name="coder",preset_name="IU: Medium",template_name="ValidTemplate"} 0
coderd_prebuilt_workspaces_preset_hard_limited{organization_name="coder",preset_name="WS: Small",template_name="Test7"} 1
```

NOTE:
```go
if !ps.Preset.Deleted && ps.Preset.UsingActiveVersion {
	c.metrics.trackHardLimitedStatus(ps.Preset.OrganizationName, ps.Preset.TemplateName, ps.Preset.Name, ps.IsHardLimited)
}
```

Only active template version is tracked. If admin creates new template
version - old value of metric (for previous template version) will be
overwritten with new value of metric (for active template version).
Because `template_version` is not part of metric:
```go
labels = []string{"template_name", "preset_name", "organization_name"}
```

Implementation is similar to implementation of
`MetricResourceReplacementsCount` metric

---------

Co-authored-by: Susana Ferreira <ssncferreira@gmail.com>

We are using knip

## Summary 

This PR introduces support for expiration policies in prebuilds. The TTL
(time-to-live) is retrieved from the Terraform configuration
([terraform-provider-coder
PR](coder/terraform-provider-coder#404)):
```
prebuilds = {
	  instances = 2
	  expiration_policy {
		  ttl = 86400
	  }
  }
```
**Note**: Since there is no need for precise TTL enforcement down to the
second, in this implementation expired prebuilds are handled in a single
reconciliation cycle: they are deleted, and new instances are created
only if needed to match the desired count.

## Changes

* The outcome of a reconciliation cycle is now expressed as a slice of
reconciliation actions, instead of a single aggregated action.
* Adjusted reconciliation logic to delete expired prebuilds and
guarantee that the number of desired instances is correct.
* Updated relevant data structures and methods to support expiration
policies parameters.
* Added documentation to `Prebuilt workspaces` page
* Update `terraform-provider-coder` to version 2.5.0:
https://github.com/coder/terraform-provider-coder/releases/tag/v2.5.0

Depends on: coder/terraform-provider-coder#404
Fixes: #17916