Update Pytorch to ~2.1.0 in the installer script (#5089)

## What type of PR is this? (check all applicable)

- [ ] Refactor
- [ ] Feature
- [X] Bug Fix
- [X] Optimization
- [ ] Documentation Update
- [ ] Community Node Submission


## Have you discussed this change with the InvokeAI team?
- [ ] Yes
- [X] No, because it's required

      
## Have you updated all relevant documentation?
- [ ] Yes
- [X] No, not necessary


## Description

We use Pytorch ~2.1.0 as a dependency for InvokeAI, but the installer
still installs 2.0.1 first until Invoke AIs dependencies kick in which
causes it to get deleted anyway and replaced with 2.1.0. This is
unnecessary and probably not wanted.

Fixed the dependencies for the installation script to install Pytorch
~2.1.0 to begin with.

P.s. Is there any reason why "torchmetrics==0.11.4" is pinned? What is
the reason for that? Does that change with Pytorch 2.1? It seems to work
since we use it already. It would be nice to know the reason.

Greetings

## Related Tickets & Documents

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## QA Instructions, Screenshots, Recordings

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## Added/updated tests?

- [ ] Yes
- [ ] No : _please replace this line with details on why tests
      have not been included_

## [optional] Are there any post deployment tasks we need to perform?

installer/lib/installer.py

@@ -244,7 +244,7 @@ class InvokeAiInstance:
                 "numpy~=1.24.0",  # choose versions that won't be uninstalled during phase 2
                 "urllib3~=1.26.0",
                 "requests~=2.28.0",
-                "torch~=2.0.0",
+                "torch~=2.1.0",
                 "torchmetrics==0.11.4",
                 "torchvision>=0.14.1",
                 "--force-reinstall",