Add CTP7 TX optical power measurement

Description

Title says it all! During some debugging, measuring the optical output power was deemed necessary. Let's merge those developments instead of losing them.

Related Issue

How Has This Been Tested?

Optical output power can be measured on the b904 GE1/1 integration setup for all fibers.

0 1028
1 996
2 1014
3 1024
4 962
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7 1041
8 1074
9 1080
10 1149
11 1079

12 973
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14 1057
15 980
16 938
17 1005
18 1034
19 1024
20 1041
21 1064
22 1119
23 937

24 882
25 915
26 1040
27 1005
28 901
29 959
30 1025
31 1004
32 1019
33 1063
34 977
35 944

48 1068
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50 1079
51 1180
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53 1181
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57 1213
58 1142
59 1283

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.