feat: gracefully upgrade from v1 to v2-based setup

[RomainMuller]

Have orchestrion pin transparently replace gopkg.in/DataDog/dd-trace-go.v1 imports with github.com/DataDog/dd-trace-go/orchestrion/all/v2 while also ensuring any outstanding gopkg.in/DataDog/dd-trace-go.v1 is at least at v1.74.0.

This makes it more straight forward to upgrade to "natively v2" configuration.

[codecov]

Codecov Report

Attention: Patch coverage is 56.25000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 53.05%. Comparing base (e01054e) to head (4a9d73a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/pin/pin.go	56.25%	5 Missing and 2 partials ⚠️

❗ There is a different number of reports uploaded between BASE (e01054e) and HEAD (4a9d73a). Click for more details.

HEAD has 13 uploads less than BASE

Flag	BASE (e01054e)	HEAD (4a9d73a)
Windows	1	0
ARM64	1	0
GOFLAGS	1	0
generators	1	0
X64	1	0
Linux	1	0
TOOLEXEC	1	0
macOS	1	0
integration	1	0
go1.24	1	0
go1.25rc2	1	0
DRIVER	1	0
go1.23	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #661       +/-   ##
===========================================
- Coverage   68.50%   53.05%   -15.46%     
===========================================
  Files         113      112        -1     
  Lines        7916     7717      -199     
===========================================
- Hits         5423     4094     -1329     
- Misses       1954     3221     +1267     
+ Partials      539      402      -137     

Components	Coverage Δ
Generators	0.00% <ø> (-80.25%)	⬇️
Instruments	∅ <ø> (∅)
Go Driver	49.06% <ø> (-27.45%)	⬇️
Toolexec Driver	23.42% <ø> (-47.41%)	⬇️
Aspects	65.04% <ø> (-9.29%)	⬇️
Injector	67.56% <ø> (-7.31%)	⬇️
Job Server	54.79% <ø> (-14.44%)	⬇️
Other	53.05% <56.25%> (-15.46%)	⬇️

Files with missing lines	Coverage Δ
internal/pin/pin.go	61.15% <56.25%> (+1.67%)	⬆️

... and 52 files with indirect coverage changes

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