HIVE-29065: Fix Dockerfile warnings - FromAsCasing and InvalidDefault…

[kokila-19]

…ArgInFrom

What changes were proposed in this pull request?
In the Dockerfile, Match the case for all keywords (UPPER CASE).
Default value for BUILD_ENV argument. "FROM" determines the base image for the build and arg BUILD_ENV is used here. If it is empty/invalid , the image will not be created. So docker lint checks for this issue. To avoid it, a default value needs to set.

Why are the changes needed?
To remove the warnings thrown during docker build.

 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 19)                                                                                                                           
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 24)                                                                                                                            
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 36)                                                                                                                            
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 47)                                                                                                                            
 => WARN: InvalidDefaultArgInFrom: Default value for ARG ${BUILD_ENV} results in empty or invalid base image name (line 47) 

Does this PR introduce any user-facing change?
No

How was this patch tested?
Create the docker image using build script for both hive and hms image.
./build.sh

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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