Go119 bump (#1)

[gururajsh]

• Upgrades go from 1.18 to 1.19

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Does this PR modify CLI v6, CLI v7, or CLI v8?

No

Description of the Change

Golang version upgrade from 1.18 to 1.19

Why Is This PR Valuable?

What benefits will be realized by the code change? What users would want this change? What user need is this change addressing?
Golang 1.19 is more secure, addresses CVEs which is useful for users.

Why Should This Be In Core?

Explain why this functionality should be in the cf CLI, as opposed to a plugin.
Because cf cli is written in golang.

Applicable Issues

List any applicable GitHub Issues here

How Urgent Is The Change?

Is the change urgent? If so, explain why it is time-sensitive.

Other Relevant Parties

Who else is affected by the change?