Tooltip text for Brave Search omnibox promo close widget is too geeky

[stephendonner]

Description

Tooltip text for Brave Search omnibox promo close widget is too geeky

Steps to Reproduce

1. installed 1.41.76
2. launched Brave using --enable-features=BraveSearchOmniboxButton command-line switch
3. set Search engine used in the address bar to DuckDuckGo
4. typed brunch
5. hovered over the X widget
6. read the tooltip text

Actual result:

Dismiss brave search conversion

Expected result:

Something like Close Brave Search promotion (@rmcfadden3 help wordsmithing?)

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.41.76 Chromium: 103.0.5060.53 (Official Build) beta (x86_64)
Revision	a1711811edd74ff1cf2150f36ffa3b0dae40b17f-refs/branch-heads/5060@{#853}
OS	macOS Version 11.6.7 (Build 20G630)

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? No
• Can you reproduce this issue with the nightly channel? Yes

cc @rmcfadden3 @aguscruiz @jenn-rhim

[stephendonner]

We can probably do this in one shot; this also affects the tooltip for the banner:

1. installed 1.41.76
2. launch Brave using --enable-features=BraveSearchOmniboxBanner command-line switch
3. set Search engine used in the address bar to Ecosia
4. typed brunch and confirmed Try Brave Search
5. hovered over Dismiss
6. checked the tooltip

Tooltip reads Dismiss brave search conversion.

[rebron]

@rmcfadden3 Dismiss here will function more like a "Don't show this again"

[rmcfadden3]

@rebron & @stephendonner — I'm good with the "Don't show this again" text. It makes sense here, and also saves us on localization.

[stephendonner]

Verified PASSED using

Brave	1.42.21 Chromium: 103.0.5060.53 (Official Build) nightly (x86_64)
Revision	a1711811edd74ff1cf2150f36ffa3b0dae40b17f-refs/branch-heads/5060@{#853}
OS	macOS Version 12.5 (Build 21G5046c)

Followed my original steps to reproduce, above.

Confirmed the tooltip text now reads Don't show this again

button	banner