Add a env flag to allow skip installing dependencies when run ./build.sh

[hzxuzhonghu]

Task description:

When i develop locally, frequently i need to run building binaries. But every time it run ap-get update and installing every package it need like protobuf libbpf, etc.

Solution:

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[Shuimo03]

/assign

[codesmith25103]

/assign

[hzxuzhonghu]

/unassign @Shuimo03