Elasticsearch image build: remove elasticsearch installer after installation

[syedriko]

Description

Remove elasticsearch installer after installation, trim 100MB off the resulting image.

/cc @vimalk78 /assign @jcantrill

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill, syedriko

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

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-ci[bot]]

@syedriko: all tests passed!

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository. I understand the commands that are listed [here](https://go.k8s.io/bot-commands).

[syedriko]

/cherry-pick release-5.4 /cherry-pick release-5.3

[openshift-cherrypick-robot]

@syedriko: cannot checkout release-5.4: error checking out release-5.4: exit status 1. output: error: pathspec 'release-5.4' did not match any file(s) known to git

In response to [this](https://github.com/openshift/origin-aggregated-logging/pull/2241#issuecomment-1028358227): >/cherry-pick release-5.4 >/cherry-pick release-5.3 > > Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.