Do away with HTTP server and instead used a Go based File server for hosting binaries

[anandf]

What type of PR is this? /kind enhancement

What does this PR do / why we need it: The kam container image uses httpd base image which requires frequent updates for CVE fixes and is difficult to maintain. By using a Go based fileserver for hosting the binaries for different OS and architecture, we can do away with HTTP server and instead use a light weight image. Even a scratch base image should be enough for running a go binary.

Have you updated the necessary documentation?

• [ ] Documentation update is required by this PR.
• [ ] Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #?

How to test changes / Special notes to the reviewer:

[openshift-merge-robot]

PR needs rebase.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (9babd9f) 58.61% compared to head (6dd6ce2) 58.61%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #346 +/- ## ======================================= Coverage 58.61% 58.61% ======================================= Files 57 57 Lines 2885 2885 ======================================= Hits 1691 1691 Misses 1028 1028 Partials 166 166 ``` | [Flag](https://app.codecov.io/gh/redhat-developer/kam/pull/346/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/redhat-developer/kam/pull/346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer) | `58.61% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer#carryforward-flags-in-the-pull-request-comment) to find out more.

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[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wtam2018

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/redhat-developer/kam/blob/master/OWNERS)~~ [wtam2018] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.61%. Comparing base (9babd9f) to head (6dd6ce2).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #346 +/- ## ======================================= Coverage 58.61% 58.61% ======================================= Files 57 57 Lines 2885 2885 ======================================= Hits 1691 1691 Misses 1028 1028 Partials 166 166 ``` | [Flag](https://app.codecov.io/gh/redhat-developer/kam/pull/346/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/redhat-developer/kam/pull/346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer) | `58.61% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer#carryforward-flags-in-the-pull-request-comment) to find out more.

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:loudspeaker: Have feedback on the report? Share it here.