Fix get.sh to select between --version and version subcommand

[kishen-v]

Binary already exists in path :


VERSION=v0.1.15 ./get.sh

To replace an old version of pvsadm, run this script with an environment variable: FORCE=1

pvsadm is already installed!
Version: v0.1.15, GoVersion: go1.21.11
-----------
VERSION=v0.1.18 ./get.sh. <- manually built from source with the version tag set to 1.18

To replace an old version of pvsadm, run this script with an environment variable: FORCE=1

pvsadm is already installed!
Version: 0.18.0 GoVersion: go1.22.4

A binary is required to be installed

VERSION=v0.1.15 ./get.sh

To replace an old version of pvsadm, run this script with an environment variable: FORCE=1

############################################################################################################# 100.0%
Version: v0.1.15, GoVersion: go1.21.11

Additional notes:
0.1.16 does also seem to report of the API key required to be set : #664.

[kishen-v]

Additional note: the builds of 0.1.16 are affected too, which may require phasing out the release binary.

[mkumatag]

/lgtm

[ppc64le-cloud-bot]

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This pull-request has been approved by: kishen-v, mkumatag

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