Fix prealloc 500 error by making prealloc in tangoREST.py async

[20wildmanj]

Fixes #242. Tested by running pathon tango-cli.py -k [KEY] --prealloc --num [count] --image [image] --vmms localDocker within Tango/clients/

[coderabbitai]

Walkthrough

Walkthrough

The change involves updating the prealloc method to be asynchronous, addressing an issue where preallocate requests would allocate slots but fail due to a TypeError. The modification was made to ensure that the function operates correctly in an asynchronous environment, likely resolving the internal server error by fixing the improper use of a dictionary in an 'await' expression.

Changes

File Path	Change Summary
.../tangoREST.py	Modified prealloc to be an asynchronous function.

Assessment against linked issues

Objective	Addressed	Explanation
Expected behavior of preallocate request to return a successful result (#242)	✅
Correction of TypeError related to dictionary usage in 'await' expression (#242)	✅
Reproduction steps involving preallocate with specific key, count, and image parameters (#242)	❓	Without the specific changes or the code snippet, it's unclear if the reproduction steps are directly addressed. However, the async modification suggests that the TypeError might be resolved.

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[damianhxy]

LGTM